Acronyms – Sulfate of Potash, NPK 0-0-50

Chemical Formula: K2SO4

Potassium sulphate is usually available in all different forms depending upon application:

This is fully water soluble, virtually chlorine free fertilizer which can be used on any crop. It contains a minimum of 50 % Potassium as K2O and Sulphur 17-18%. Potassium helps in the increase of qualitative yield especially seen in the case of fruit crops.

For crops sensitive to chloride and salt, the best way to assure top quality is with potassium sulphate-based fertigation. For stronger growth, longer storage, and a more appealing product, SOP is the quality choice.

Various grades of Potassium sulfate available are as follows -

Component Standard SOP Soluble SOP Granular SOP
wt% wt% wt%
K2O Min. 50.0 Min. 50.5 Min. 50.0
Cl-1 Max 2.5 Max 1.0 Max 2.5
Moisture content ≤1.0 ≤0.5 ≤1.0
Solubility 120g in 1000ml H2O 135g in 1000ml H2O 120g in 1000ml H2O


Physical Analysis
Standard and Soluble Granular
1) Bulk Density loose = 1.150 – 1.300 ton/m3.
2) Size distribution: 85% of the sample size is greater than 50 µm
1) Particle size distribution : 2 to 6 mm.
2) Hardness : 15, 20, 30 N/mm2, can be adjusted
3) Bulk density : 1.5g/m3


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